福建山药种质资源多糖含量评价

以61份福建山药种质资源为材料，采用硫酸-苯酚法测定其多糖含量，用DPS软件进行聚类分析，对山药种质资源的多糖含量进行评价。结果表明，61份福建山药种质资源中，多糖含量为0.7288％～8.6377％，平均含量为2.4477％，极差为7.9089，采用类平均聚类法将61份福建山药种质资源按其多糖含量聚成3大类，分别为高型、中型、低型。对高、中、低型山药资源的主要统计参数进行考查，其变异系数分别为1.57％、5.85％、5.59％，中、低2个类群中多糖含量的变异较为丰富。褐苞薯蓣和参薯在3个多糖群中均有分布，推测山药多糖含量的高低与山药类型没有直接关系。

Assessment on the Polysaccharide Content of Germplasm of Chinese Yam in Fujian Province

The polysaccharide content of 61 germplasms of Chinese yam in Fujian Province was tested by Phenyl hydrate-Sulfuric acid ,based on the polysaccharide content of germplasm of Chinese yam by cluster analysis with DPS .Among 61 germplasms of Chinese yam in Fujian Province ,the polysaccharide content ranges from 0.7288%to 8.6377% with the average of 2.4477% and the range of 7.9089% .The 61 germplasms of Chinese yam in Fujian Province were divided into three groups according to the polysaccharide content by Unweight Pair-group Method , including the high ,the medium ,and the low group .By analyzing the mainly statistical parameter of the high , medium and low groups of germplasm of Chinese yam ,the results indicated that their variable coefficients were 1.57% ,5.85% and 5.59% respectively ,and there were relatively plentiful variation of polysaccharide content among the medium and low groups .As dioscorea persimilis Prain et Burkill and dioscorea alata L were found to be distributed in all the three groups ,we speculated that there was no direct relationship between the polysaccharide content of Chinese yam and their types .